Optical design of a miniature Fourier transform lens system for a hybrid digital-optical correlator

2002 ◽  
Vol 41 (7) ◽  
pp. 1650 ◽  
Author(s):  
Philip M. Birch
Keyword(s):  
Fourier Transform ◽  
Optical Design ◽  
Lens System ◽  
Optical Correlator

Improved correlation discrimination using joint fourier-transform optical correlator

1991 ◽  
Vol 4 (3) ◽  
pp. 103-106 ◽  
Author(s):  
Mohammad S. Alam ◽  
Abdul Ahad S. Awwal ◽  
Mohammad A. Karim
Keyword(s):  
Fourier Transform ◽  
Optical Correlator

Design of Compact Infrared Zoom Lens System

2012 ◽  
Vol 571 ◽  
pp. 324-327
Author(s):  
A Qi Yan ◽  
Deng Shan Wu ◽  
Hao Wang ◽  
Jian Zhong Cao ◽  
Jing Jin Ma ◽  
...  
Keyword(s):  
Focal Plane ◽  
Low Cost ◽  
Optical Design ◽  
Focal Plane Array ◽  
Relevant Information ◽  
Commercial Application ◽  
Zoom Lens ◽  
Lens System ◽  
Compact Design ◽  
Infrared Materials

Infrared zoom lens system with cooled focal plane array (FPA) detector is widely used in military application. Relevant information about optical design can be got easily, but research on infrared zoom lens system with low cost and high image quality for commercial application is less. This paper design a Compact infrared zoom lens system with only four lenses, using an uncooled focal plane array (FPA) with 384×288 pixels with zoom ratio 3:1. Because of large F number and less lenses, transmission of the whole zoom system is greatly improved. NETD and MRTD of infrared system will be satisfying by this compact design. There is no special surface such as diffractive surface, HOE in zoom lens system, and only Ge and Znse infrared materials are chosen which result in lower production cost of infrared zoom lens system for commercial applications.

On Fourier's Phase and Gradient Index Optical Design

1994 ◽  
Vol 374 ◽  
Author(s):  
Peter D. Haaland
Keyword(s):  
Refractive Index ◽  
Fourier Transform ◽  
Constrained Optimization ◽  
Phase Modulation ◽  
Fourier Transforms ◽  
Optical Design ◽  
Optical Filters ◽  
Gradient Index ◽  
Design Objective ◽  
The Relationship

AbstractGradient index or rugate optical filters are continuous generalizations of the familiar quarterwave stack which find widespread applications in sensor hardening. In the design of a filter or mirror there are infinitely many refractive index profiles n(x) whose wavelength-dependent reflectance R(λ) is specified as a design objective. The relationship between R(λ) and n(x) is nearly that of a Fourier-transform pair. Exploiting this relationship, specifically the physically indeterminate phase of the Fourier transforms, permits constrained optimization of rugate designs. In this contribution we outline the approach of optimal phase modulation and indicate by examples its application to problems in optical limiting.

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